Birth:

"...The year 1623, A son Fridmar, was born to me on January 24 in Linz. He was baptized in the country home of the honorable Johannes Reu (?), first preacher. Godparents: Dr. Abraham Schwarz, Herr Sebastian Paumaister, Baron Jorner with wife Katharina, maiden name Hagen from Karnten..."

SOURCE: Johannes Kepler Journal, quoted in "Kepler's Witch" by James A. Connor; page 339.